$(document).ready(function () {
  var marginTop = 0;
  var maxHeight =  $('.left')[0].scrollHeight;
  console.log(maxHeight);
  var interval = setInterval(function () {
    marginTop = marginTop - 80;
    if(Math.abs(marginTop) > maxHeight) {
        clearInterval(interval);
    }else {
      $('.leftul:first-child li:first-child').css({"margin-top":marginTop+"px"});
      console.log(1);
    }
  },500)








})
